Patent class list (only not empty are listed)

Furnaces

Subclass of: 110 - Furnaces

Deeper subclasses:

110185000 - WITH CONTROL MEANS RESPONSIVE TO A SENSED CONDITION (12)
110191000 - WITH PROGRAMMED OR CYCLIC CONTROL MEANS (2)
110193000 - WITH SAFETY MEANS (2)
110203000 - WITH EXHAUST GAS TREATMENT MEANS (25)
110218000 - WITH FUEL TREATMENT MEANS (7)
110233000 - COMBINED (8)
110235000 - REFUSE INCINERATOR (17)
110260000 - INCLUDING FLUID FUEL BURNER (4)
110263000 - UTILIZING POWDERED FUEL (5)
110267000 - INCLUDING MEANS TO FEED SOLID FUEL (3)
110297000 - INCLUDING NONCOMBUSTIBLE FLUID SUPPLY MEANS (1)
110322000 - BAFFLE OR HEAT RETAINER STRUCTURE (1)
110327000 - SOLID FUEL FEED STRUCTURE (1)
110331000 - ARCH OR ROOF STRUCTURE (1)
110336000 - WALL STRUCTURE (2)
110338000 - BRICK ELEMENT (1)
110341000 - PROCESS (38)
110101000 - FUEL FEEDERS (3)
110165000 - ASH RECEIVING AND HANDLING DEVICES (2)
110173000 - DOORS (1)
110000000 - DOORS AND CASINGS (2)
110182500 - TUYERES (2)

Patents in all subclasses Furnaces